-
-static int spdif_header_ac3(AVFormatContext *s, AVPacket *pkt)
-{
- IEC958Context *ctx = s->priv_data;
- int bitstream_mode = pkt->data[6] & 0x7;
-
- ctx->data_type = IEC958_AC3 | (bitstream_mode << 8);
- ctx->pkt_offset = AC3_FRAME_SIZE << 2;
- return 0;
-}
-
-static int spdif_header_dts(AVFormatContext *s, AVPacket *pkt)
-{
- IEC958Context *ctx = s->priv_data;
- uint32_t syncword_dts = AV_RB32(pkt->data);
- int blocks;
-
- switch (syncword_dts) {
- case DCA_MARKER_RAW_BE:
- blocks = (AV_RB16(pkt->data + 4) >> 2) & 0x7f;
- break;
- case DCA_MARKER_RAW_LE:
- blocks = (AV_RL16(pkt->data + 4) >> 2) & 0x7f;
- break;
- case DCA_MARKER_14B_BE:
- blocks =
- (((pkt->data[5] & 0x07) << 4) | ((pkt->data[6] & 0x3f) >> 2));
- break;
- case DCA_MARKER_14B_LE:
- blocks =
- (((pkt->data[4] & 0x07) << 4) | ((pkt->data[7] & 0x3f) >> 2));
- break;
- default:
- av_log(s, AV_LOG_ERROR, "bad DTS syncword 0x%x\n", syncword_dts);
- return -1;
- }
- blocks++;
- switch (blocks) {
- case 512 >> 5: ctx->data_type = IEC958_DTS1; break;
- case 1024 >> 5: ctx->data_type = IEC958_DTS2; break;
- case 2048 >> 5: ctx->data_type = IEC958_DTS3; break;
- default:
- av_log(s, AV_LOG_ERROR, "%i samples in DTS frame not supported\n",
- blocks << 5);
- return -1;
- }
- ctx->pkt_offset = blocks << 7;
-
- return 0;
-}
-
-static const enum IEC958DataType mpeg_data_type[2][3] = {
- // LAYER1 LAYER2 LAYER3
- { IEC958_MPEG2_LAYER1_LSF, IEC958_MPEG2_LAYER2_LSF, IEC958_MPEG2_LAYER3_LSF }, //MPEG2 LSF
- { IEC958_MPEG1_LAYER1, IEC958_MPEG1_LAYER23, IEC958_MPEG1_LAYER23 }, //MPEG1
-};
-
-static const uint16_t mpeg_pkt_offset[2][3] = {
- //LAYER1 LAYER2 LAYER3
- { 3072, 9216, 4608 }, // MPEG2 LSF
- { 1536, 4608, 4608 }, // MPEG1
-};
-
-static int spdif_header_mpeg(AVFormatContext *s, AVPacket *pkt)
-{
- IEC958Context *ctx = s->priv_data;
- int version = (pkt->data[1] >> 3) & 3;
- int layer = 3 - ((pkt->data[1] >> 1) & 3);
- int extension = pkt->data[2] & 1;
-
- if (layer == 3 || version == 1) {
- av_log(s, AV_LOG_ERROR, "Wrong MPEG file format\n");
- return -1;
- }
- av_log(s, AV_LOG_DEBUG, "version: %i layer: %i extension: %i\n", version, layer, extension);
- if (version == 2 && extension) {
- ctx->data_type = IEC958_MPEG2_EXT;
- ctx->pkt_offset = 4608;
- } else {
- ctx->data_type = mpeg_data_type [version & 1][layer];
- ctx->pkt_offset = mpeg_pkt_offset[version & 1][layer];
- }
- // TODO Data type dependant info (normal/karaoke, dynamic range control)
- return 0;
-}
-
-static int spdif_header_aac(AVFormatContext *s, AVPacket *pkt)
-{
- IEC958Context *ctx = s->priv_data;
- AACADTSHeaderInfo hdr;
- GetBitContext gbc;
- int ret;
-
- init_get_bits(&gbc, pkt->data, AAC_ADTS_HEADER_SIZE * 8);
- ret = ff_aac_parse_header(&gbc, &hdr);
- if (ret < 0) {
- av_log(s, AV_LOG_ERROR, "Wrong AAC file format\n");
- return -1;
- }
-
- ctx->pkt_offset = hdr.samples << 2;
- switch (hdr.num_aac_frames) {
- case 1:
- ctx->data_type = IEC958_MPEG2_AAC;
- break;
- case 2:
- ctx->data_type = IEC958_MPEG2_AAC_LSF_2048;
- break;
- case 4:
- ctx->data_type = IEC958_MPEG2_AAC_LSF_4096;
- break;
- default:
- av_log(s, AV_LOG_ERROR, "%i samples in AAC frame not supported\n",
- hdr.samples);
- return -1;
- }
- //TODO Data type dependent info (LC profile/SBR)
- return 0;
-}
-
-static int spdif_write_header(AVFormatContext *s)
-{
- IEC958Context *ctx = s->priv_data;
-
- switch (s->streams[0]->codec->codec_id) {
- case CODEC_ID_AC3:
- ctx->header_info = spdif_header_ac3;
- break;
- case CODEC_ID_MP1:
- case CODEC_ID_MP2:
- case CODEC_ID_MP3:
- ctx->header_info = spdif_header_mpeg;
- break;
- case CODEC_ID_DTS:
- ctx->header_info = spdif_header_dts;
- break;
- case CODEC_ID_AAC:
- ctx->header_info = spdif_header_aac;
- break;
- default:
- av_log(s, AV_LOG_ERROR, "codec not supported\n");
- return -1;
- }
- return 0;
-}
-
-static int spdif_write_trailer(AVFormatContext *s)
-{
- IEC958Context *ctx = s->priv_data;
- av_freep(&ctx->buffer);
- return 0;
-}
-
-static int spdif_write_packet(struct AVFormatContext *s, AVPacket *pkt)
-{
- IEC958Context *ctx = s->priv_data;
- int ret, padding;
-
- ctx->pkt_size = FFALIGN(pkt->size, 2) << 3;
- ret = ctx->header_info(s, pkt);
- if (ret < 0)
- return -1;
-
- padding = (ctx->pkt_offset - BURST_HEADER_SIZE - pkt->size) >> 1;
- if (padding < 0) {
- av_log(s, AV_LOG_ERROR, "bitrate is too high\n");
- return -1;
- }
-
- put_le16(s->pb, SYNCWORD1); //Pa
- put_le16(s->pb, SYNCWORD2); //Pb
- put_le16(s->pb, ctx->data_type); //Pc
- put_le16(s->pb, ctx->pkt_size); //Pd
-
-#if HAVE_BIGENDIAN
- put_buffer(s->pb, pkt->data, pkt->size & ~1);
-#else
- av_fast_malloc(&ctx->buffer, &ctx->buffer_size, pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
- if (!ctx->buffer)
- return AVERROR(ENOMEM);
- bswap_buf16((uint16_t *)ctx->buffer, (uint16_t *)pkt->data, pkt->size >> 1);
- put_buffer(s->pb, ctx->buffer, pkt->size & ~1);
-#endif
-
- if (pkt->size & 1)
- put_be16(s->pb, pkt->data[pkt->size - 1]);
-
- for (; padding > 0; padding--)
- put_be16(s->pb, 0);
-
- av_log(s, AV_LOG_DEBUG, "type=%x len=%i pkt_offset=%i\n",
- ctx->data_type, pkt->size, ctx->pkt_offset);
-
- put_flush_packet(s->pb);
- return 0;
-}
-
-AVOutputFormat spdif_muxer = {
- "spdif",
- NULL_IF_CONFIG_SMALL("IEC958 - S/PDIF (IEC-61937)"),
- NULL,
- "spdif",
- sizeof(IEC958Context),
- CODEC_ID_AC3,
- CODEC_ID_NONE,
- spdif_write_header,
- spdif_write_packet,
- spdif_write_trailer,
-};